ProSpray 27 • 31
39
g
Repairs at the unit
3.
4. Pull off clamp on suction tube and remove return ho-
se.
5. Unscrew the connection hose (Fig. 14, Item 1) to the
high-pressure filter.
6. Swivel the unit 90° to the rear in order to work more
easily on the material feed pump.
7. Loosen and unscrew inlet valve housing (2) from the
lower housing (3) with light blows from a hammer or
unscrew with an adjusting wrench.
8. Remove bearing ring (4), O-ring (5), O-ring (6), inlet
valve seat (7), inlet valve ball (8) and upper ball guide
(9).
9. Clean all the parts with the corresponding cleaning
agent.
Check the inlet valve housing (2), inlet valve seat (7)
and inlet valve ball (8) for wear and replace the parts
if necessary. If the worn inlet valve seat (7) is unused
on one side, install it the other way around.
10. Carry out installation in the reverse order.
Lubricate O-ring (5) with machine grease and ensure
proper seating in the inlet valve housing (2).
9
8
7
6
5
4
2
1
3
16
17
18
19
20
14
15
12
13
10
11
11. Unscrew lower housing (Fig. 15, Item 10) with adju-
sting wrench while holding the upper housing (11)
securely with a second adjusting wrench.
12. Remove bearing ring (13) and O-ring (12).
13. Screw out outlet valve housing (14) from the piston
(15) with 3/8 inch hexagon socket head wrench.
14. Remove the upper seal (16), upper ball guide (17),
outlet valve ball (18), washer (19) and outlet valve
seating (20).
15. Clean all the parts with the corresponding cleaning
agent. Check outlet valve housing (14), outlet valve
seat (20), outlet valve ball (18) and upper ball guide
(17) for wear and replace parts if necessary. If the
worn outlet valve seat (20) is unused on one side, in-
stall it the other way around.
16. Carry out installation in the reverse order.
Lubricate O-ring (12) with machine grease and ensu-
re proper seating in the lower housing (10).
Danger
Unplug the power plug from the outlet.
